M1-3A/R7D Zoning District — New York City

No designation in this batch shows a tighter lot fabric than this one: a median of just 1,630 square feet, with even the 90th-percentile lot reaching only 2,750 square feet — smaller, at both ends, than the lot sizes recorded for most other designations profiled here. On ground that constrained, the recorded construction history also skips a chapter other designations show — the 1945-1975 postwar boom accounts for 0% of the stock here, none at all. Instead the record splits between the deep past and the recent present: 63% of buildings predate 1940, at a median construction year of 1930, while 38% have gone up since 2000 — recent construction adding more to this footprint than the boom era ever did, a reversal of the usual pattern where prewar stock and boom-era stock together dwarf anything built since.

Vacant land classifications lead the recorded building classes at 23%, mixed residential-and-commercial buildings follow at 18%, and garage buildings add 14% — a mix that still leaves real ground undeveloped on record even on lots this small. Land use splits evenly between mixed residential-and-commercial use and vacant land, both at 24%, with commercial-and-office use at 14%. Only 33% of lots are coded residential, and the file counts 35 homes across the designation, a small total consistent with a footprint this tight, one of the smaller recorded unit counts among the designations in this batch, and a reminder that a tight lot fabric does not by itself guarantee a large housing count.

Buildings rise to a median of 2 stories, with 0% recorded above 6 floors — a height figure that tracks the small lots beneath it and rules out any recorded taller construction on this footprint. None of these lots, 0%, sit inside the mapped federal flood zone, and none, 0%, carry historic-district status on record, leaving zoning as the only recorded regulatory layer here.

Every one of these roughly 22 lots, 100%, records floor area below its allowance, with a median residual of 3.6 FAR — a wide recorded gap given how little ground each lot actually holds. Each of the 22 lots keeps its own figures on its own page, separate from these citywide shares; the rules governing floor area and height here, sourced and cited, are set out in the tables above rather than in this summary of recorded stock.